A model L-1A multinational executive or manager petition or L Blanket application support letter. This letter is used by employers to support L-1A nonimmigrant visa petitions to the US Citizenship and Immigration Services (USCIS), L Blanket applications to a US consular official, or a USCIS petition or L Blanket application by a Canadian citizen to an immigration inspector at a port of entry. This Standard Document has integrated notes with important explanations and drafting tips.